To solve the serious problem of edge cracks on the hot rolled strips-SPHE, by the analysis of the chemical compounds, the microstructure metallographic and the inclusions on the specimen, and the researches of the innormal situation of locale technology, it is though of as the main cause of edge cracks that Mn Content is a little lower and the compounds of FeS with the low melting point is generated in the intergranular. The quantity of inclusions in steel too more, the heating time of the Slab in the heating furnace too longer, and the segregation of S in the center of the slab and so forth make the edge cracks worse further so that the torn selvedge of the hot rolling strips happen. For the sake of controlling the defects of the edge cracks effectively, the control lower limit of Mn content in the factory criterion is heighten, the Cleanliness of Steel is improved by reducing the S content and the inclusions content in steel, the technology of the heating furnace is optimized. Moreover, the controlling effect to the edge crack is very evident.